This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 1 | 331 |
| 2 | 661 |
| 3 | 881 |
| 4 | 991 |
| 5 | 12211 |
| 6 | 14411 |
| 7 | 15511 |
| 8 | 20021 |
| 9 | 21121 |
| 10 | 23321 |
| 11 | 24421 |
| 12 | 29921 |
| 13 | 33331 |
| 14 | 35531 |
| 15 | 41141 |
| 16 | 45541 |
| 17 | 47741 |
| 18 | 50051 |
| 19 | 51151 |
| 20 | 57751 |
| 21 | 59951 |
| 22 | 63361 |
| 23 | 71171 |
| 24 | 72271 |
| 25 | 74471 |
| 26 | 75571 |
| 27 | 81181 |
| 28 | 84481 |
| 29 | 99991 |
| 30 | 1022011 |
| 31 | 1255211 |
| 32 | 1299211 |
| 33 | 1311311 |
| 34 | 1344311 |
| 35 | 1355311 |